The Environmental Defenders Office says the Queensland Government could be vulnerable to legal action for refusing to extend the public comment deadline for the proposed multi-billion-dollar Aquis resort in Cairns.

Some residents had asked for 12 weeks to consider a 4,000-page environmental impact statement for the project but Deputy Premier Jeff Seeney says the six-week consultation period is sufficient and longer than what is required by law.

Solicitor Jo-Anne Bragg says it could be grounds for a legal challenge.

"But of course we know it's very hard for people in the community to go to court, it takes resources," she said.

"As you may be aware the State Government in July 2012 defunded Environmental Defenders' community legal centres who help rural and urban people with these sort of matters.

"On many other major projects we've seen much longer time frames for public input.

"What needs to be remembered by the politicians and the professionals involved in these sort of major projects is people in the community can't work on their submissions 24-hours-a-day, seven-days-a-week. They've got jobs, they're off to work."